AirHint found the following cheapest return flights from London (LHR) to Delhi (DEL) in September 2025 (see full year).

Return flights

09 Sep - 24 Sep	Saudia
03 Sep - 27 Sep	Saudia
11 Sep - 23 Sep	Saudia
13 Sep - 30 Sep	Saudia
22 Sep - 29 Sep	Saudia
14 Sep - 25 Sep	Saudia
06 Sep - 25 Sep	Saudia
23 Sep - 29 Sep	Saudia
10 Sep - 24 Sep	Saudia
04 Sep - 25 Sep	Saudia
17 Sep - 11 Oct	Saudia
28 Sep - 15 Oct	Saudia
12 Sep - 04 Oct	Saudia
24 Sep - 11 Oct	Saudia
11 Sep - 21 Oct	Saudia
22 Sep - 22 Oct	Saudia
13 Sep - 04 Oct	Saudia
25 Sep - 02 Oct	Saudia
26 Sep - 06 Oct	Saudia
07 Sep - 04 Oct	Saudia

Also check the deals for one-way flights from London to Delhi in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Delhi in September from 378€

Return flights